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Diffstat (limited to 'sysdeps/s390/atomic-machine.h')
| -rw-r--r-- | sysdeps/s390/atomic-machine.h | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/sysdeps/s390/atomic-machine.h b/sysdeps/s390/atomic-machine.h new file mode 100644 index 0000000000..4ba41077e4 --- /dev/null +++ b/sysdeps/s390/atomic-machine.h @@ -0,0 +1,120 @@ +/* Copyright (C) 2003-2016 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Martin Schwidefsky <schwidefsky@de.ibm.com>, 2003. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <stdint.h> + +typedef int8_t atomic8_t; +typedef uint8_t uatomic8_t; +typedef int_fast8_t atomic_fast8_t; +typedef uint_fast8_t uatomic_fast8_t; + +typedef int16_t atomic16_t; +typedef uint16_t uatomic16_t; +typedef int_fast16_t atomic_fast16_t; +typedef uint_fast16_t uatomic_fast16_t; + +typedef int32_t atomic32_t; +typedef uint32_t uatomic32_t; +typedef int_fast32_t atomic_fast32_t; +typedef uint_fast32_t uatomic_fast32_t; + +typedef int64_t atomic64_t; +typedef uint64_t uatomic64_t; +typedef int_fast64_t atomic_fast64_t; +typedef uint_fast64_t uatomic_fast64_t; + +typedef intptr_t atomicptr_t; +typedef uintptr_t uatomicptr_t; +typedef intmax_t atomic_max_t; +typedef uintmax_t uatomic_max_t; + +#define USE_ATOMIC_COMPILER_BUILTINS 0 + + +#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) + +#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) + +#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \ + ({ __typeof (mem) __archmem = (mem); \ + __typeof (*mem) __archold = (oldval); \ + __asm__ __volatile__ ("cs %0,%2,%1" \ + : "+d" (__archold), "=Q" (*__archmem) \ + : "d" (newval), "m" (*__archmem) : "cc", "memory" ); \ + __archold; }) + +#ifdef __s390x__ +# define __HAVE_64B_ATOMICS 1 +# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ + ({ __typeof (mem) __archmem = (mem); \ + __typeof (*mem) __archold = (oldval); \ + __asm__ __volatile__ ("csg %0,%2,%1" \ + : "+d" (__archold), "=Q" (*__archmem) \ + : "d" ((long) (newval)), "m" (*__archmem) : "cc", "memory" ); \ + __archold; }) +#else +# define __HAVE_64B_ATOMICS 0 +/* For 31 bit we do not really need 64-bit compare-and-exchange. We can + implement them by use of the csd instruction. The straightforward + implementation causes warnings so we skip the definition for now. */ +# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \ + (abort (), (__typeof (*mem)) 0) +#endif + +/* Store NEWVALUE in *MEM and return the old value. */ +/* On s390, the atomic_exchange_acq is different from generic implementation, + because the generic one does not use the condition-code of cs-instruction + to determine if looping is needed. Instead it saves the old-value and + compares it against old-value returned by cs-instruction. */ +#ifdef __s390x__ +# define atomic_exchange_acq(mem, newvalue) \ + ({ __typeof (mem) __atg5_memp = (mem); \ + __typeof (*(mem)) __atg5_oldval = *__atg5_memp; \ + __typeof (*(mem)) __atg5_value = (newvalue); \ + if (sizeof (*mem) == 4) \ + __asm__ __volatile__ ("0: cs %0,%2,%1\n" \ + " jl 0b" \ + : "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \ + : "d" (__atg5_value), "m" (*__atg5_memp) \ + : "cc", "memory" ); \ + else if (sizeof (*mem) == 8) \ + __asm__ __volatile__ ("0: csg %0,%2,%1\n" \ + " jl 0b" \ + : "+d" ( __atg5_oldval), "=Q" (*__atg5_memp) \ + : "d" ((long) __atg5_value), "m" (*__atg5_memp) \ + : "cc", "memory" ); \ + else \ + abort (); \ + __atg5_oldval; }) +#else +# define atomic_exchange_acq(mem, newvalue) \ + ({ __typeof (mem) __atg5_memp = (mem); \ + __typeof (*(mem)) __atg5_oldval = *__atg5_memp; \ + __typeof (*(mem)) __atg5_value = (newvalue); \ + if (sizeof (*mem) == 4) \ + __asm__ __volatile__ ("0: cs %0,%2,%1\n" \ + " jl 0b" \ + : "+d" (__atg5_oldval), "=Q" (*__atg5_memp) \ + : "d" (__atg5_value), "m" (*__atg5_memp) \ + : "cc", "memory" ); \ + else \ + abort (); \ + __atg5_oldval; }) +#endif |